CN215866904U

CN215866904U - AFCI intelligent arc protection detection device for distributed photovoltaic inverter

Info

Publication number: CN215866904U
Application number: CN202120538168.3U
Authority: CN
Inventors: 蔡振中
Original assignee: Sunwins Technologies Suzhou Co ltd
Current assignee: Sunwins Technologies Suzhou Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-02-18
Anticipated expiration: 2031-03-15

Abstract

The utility model relates to the technical field of arc detection, and particularly discloses an AFCI (automatic back-contact fault detection) intelligent arc protection detection device for a distributed photovoltaic inverter, which comprises an upper shell, a lower shell and a connecting block, wherein the upper shell and the lower shell are mutually closed to form a shell, and the side surfaces of the upper shell and the lower shell are mutually clamped and connected through the connecting block; the lower side of the shell is provided with a wiring terminal, the upper side of the shell is provided with a lead, the lead is electrically connected with the inverter, and the wiring terminals are arranged in parallel; a display screen and an operation button are embedded on the surface of the upper shell; an inductor and a controller are arranged in the lower shell, a resistance adjusting structure is arranged between the wiring terminal and the inductor, the display screen and the operating button are electrically connected with the controller; the arc protection detection device provided by the utility model can realize the detection of the arc and automatically break the circuit after the fault occurs so as to ensure the safety of the inverter; the device has simple integral structure, is convenient to carry and is easy to popularize.

Description

AFCI intelligent arc protection detection device for distributed photovoltaic inverter

Technical Field

The utility model relates to the technical field of arc detection, in particular to an AFCI intelligent arc protection detection device for a distributed photovoltaic inverter.

Background

A photovoltaic inverter is a power conditioning device composed of semiconductor devices, mainly used for converting direct current power into alternating current power, and generally composed of a boost circuit and an inverter bridge circuit, wherein the boost circuit boosts the direct current voltage of a solar battery to a direct current voltage required by the output control of the inverter; the inverter bridge circuit equivalently converts the boosted direct-current voltage into alternating-current voltage with common frequency. Distributed photovoltaic inverters are one type of photovoltaic inverter, and are mainly used in residential roofs and industrial and commercial roofs.

In the prior art, the traditional photovoltaic inverter is difficult to detect the arc fault, so that a fire accident occurs, and huge economic loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an AFCI intelligent arc protection detection device for a distributed photovoltaic inverter, so as to solve the problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: an AFCI intelligent arc protection detection device for a distributed photovoltaic inverter comprises an upper shell, a lower shell and a connecting block, wherein the upper shell and the lower shell are mutually closed to form a shell, and the side surfaces of the upper shell and the lower shell are mutually clamped through the connecting block; the lower side of the shell is provided with a wiring terminal, the upper side of the shell is provided with a lead, the lead is electrically connected with the inverter, and the wiring terminals are arranged in parallel; a display screen and an operation button are embedded on the surface of the upper shell; be provided with inductor and controller in the casing down, be provided with the resistance between binding post and the inductor and adjust the structure, display screen, operating button, inductor all with controller electric connection.

Preferably, the resistance adjusting structure comprises a resistance rod, an air cylinder, a support rod and a conductive block, the resistance rod is fixed on the lower shell through the support rod, and the setting direction of the resistance rod is the same as the movement direction of the output shaft of the air cylinder; the conductive block is of an annular structure and is matched and sleeved on the outer side of the resistance rod, the conductive block is fixedly connected with an output shaft of the air cylinder, and the air cylinder is controlled by the controller to work.

Preferably, the resistance rod is electrically connected with the wiring board integrated with the wiring terminal; the size of the supporting rod is smaller than that of the resistance rod, and the supporting rod is made of an insulating material.

Preferably, a winding wheel is arranged in the lower shell, and the winding wheel is connected with the lower shell through a coil spring.

Preferably, heat dissipation holes are formed in the side faces of the upper shell and the lower shell, and a protective sleeve made of a rubber material is arranged on the outer side of the lead; the connecting block is provided with a clamping hook, the upper shell and the lower shell are correspondingly provided with clamping grooves, and the clamping hook and the clamping grooves are mutually clamped.

Compared with the prior art, the utility model has the beneficial effects that: the arc protection detection device provided by the utility model can realize the detection of the arc and realize the open circuit after the fault occurs so as to ensure the safety of the inverter; the device has simple integral structure, is convenient to carry and is easy to popularize.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the construction of the lower case of the present invention;

reference numbers in the figures: 1. an upper housing; 2. a lower housing; 3. connecting blocks; 4. a wiring terminal; 5. a wire; 6. a protective sleeve; 7. a display screen; 8. an operation button; 9. heat dissipation holes; 10. an inductor; 11. a controller; 12. a wire guide plate; 13. a resistance rod; 14. a cylinder; 15. a support bar; 16. a conductive block; 17. a reel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, the present invention provides a technical solution: an AFCI intelligent arc protection detection device for a distributed photovoltaic inverter comprises an upper shell 1, a lower shell 2 and a connecting block 3, wherein the upper shell 1 and the lower shell 2 are mutually folded to form a shell, and the side surfaces of the upper shell 1 and the lower shell 2 are mutually clamped and connected through the connecting block 3; a wiring terminal 4 is arranged on the lower side of the shell, a lead 5 is arranged on the upper side of the shell, the lead 5 is electrically connected with the inverter, and a plurality of groups of wiring terminals 4 are arranged side by side; a display screen 7 and an operation button 8 are embedded on the surface of the upper shell 1; be provided with inductor 10 and controller 11 in casing 2 down, be provided with the resistance adjustment structure between binding post 4 and the inductor 10, display screen 7, operating button 8, inductor 10 all with controller 11 electric connection.

Further, the resistance adjusting structure comprises a resistance rod 13, an air cylinder 14, a support rod 15 and a conductive block 16, wherein the resistance rod 13 is fixed on the lower shell 2 through the support rod 15, and the setting direction of the resistance rod 13 is the same as the moving direction of the output shaft of the air cylinder 14; the conductive block 16 is of an annular structure and is matched and sleeved on the outer side of the resistance rod 13, the conductive block 16 is fixedly connected with an output shaft of the air cylinder 14, and the air cylinder 14 is controlled by the controller 11 to work.

Further, the resistance rod 13 is electrically connected with the wiring board 12 integrated with the wiring terminal 4; the size of the support rod 15 is smaller than that of the resistance rod 13, and the support rod 15 is made of an insulating material.

Further, a winding wheel 17 is arranged in the lower shell 2, and the winding wheel 17 is connected with the lower shell 2 through a coil spring.

Further, heat dissipation holes 9 are formed in the side faces of the upper shell 1 and the lower shell 2, and a protective sleeve 6 made of rubber materials is arranged on the outer side of the lead 5; a clamping hook is arranged on the connecting block 3, clamping grooves are correspondingly arranged on the upper shell 1 and the lower shell 2, and the clamping hook and the clamping grooves are mutually clamped.

The working principle is as follows: in the actual use process, the external equipment is butted with the wiring terminal 4 through a plug; the inductor 10 is connected through the lead plate 12 and the resistor rod 13, and then electrically connected to an external inverter through the controller 11 and the lead 5. The inductor 10 detects the current in the lead, the cylinder 14 moves telescopically, the output shaft thereof drives the conductive block 16 to move on the resistance rod 13, the conductive block 16 is positioned at different positions of the resistance rod 13, the resistance in the circuit is different in size, and the current in the circuit is maintained in a stable state by adjusting the current size in such a way; the air cylinder 14 is controlled by the controller 11 to work, and can be adjusted in time. Meanwhile, when the inductor 10 detects that an arc fault occurs in the circuit, the conductive block 16 is driven to the position of the support rod 15 through the air cylinder 14, so that the conductive block is separated from the resistance rod 13, the circuit is disconnected, and the normal operation of the inverter is ensured. The support rod 15 is smaller in size than the resistive rod 13 to facilitate movement of the conductive block 16.

The cable winding in lower casing 2 is on reel 17, and reel 17 can rotate under the effect of coil spring, carries out the rolling to the cable, and the motion of cooperation conducting block 16 avoids the cable to make a round trip to take place in the motion process in disorder, influences normal use. The upper shell and the lower shell are connected in a clamping mode through the connecting block 3 in a clamping mode through a clamping hook and a clamping groove, and the upper shell and the lower shell are convenient to detach. The heat dissipation hole 9 is convenient for the heat dissipation in the working process of the equipment, and the protective sleeve 6 protects the lead 5 and prevents the lead from being bent and damaged.

It is worth noting that: the whole device realizes control over the device through the master control button, and the device matched with the control button is common equipment, belongs to the existing mature technology, and is not repeated for the electrical connection relation and the specific circuit structure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an AFCI intelligence arc protection detection device for distributed photovoltaic inverter which characterized in that: the device comprises an upper shell (1), a lower shell (2) and a connecting block (3), wherein the upper shell (1) and the lower shell (2) are mutually folded to form a shell, and the side surfaces of the upper shell (1) and the lower shell (2) are mutually clamped through the connecting block (3); the lower side of the shell is provided with a wiring terminal (4), the upper side of the shell is provided with a lead (5), the lead (5) is electrically connected with the inverter, and the wiring terminal (4) is provided with a plurality of groups side by side; a display screen (7) and an operation button (8) are embedded on the surface of the upper shell (1); be provided with inductor (10) and controller (11) in casing (2) down, be provided with the resistance between binding post (4) and inductor (10) and adjust the structure, display screen (7), operating button (8), inductor (10) all with controller (11) electric connection.

2. An AFCI intelligent arc protection detection device for a distributed photovoltaic inverter according to claim 1, wherein: the resistance adjusting structure comprises a resistance rod (13), an air cylinder (14), a support rod (15) and a conductive block (16), wherein the resistance rod (13) is fixed on the lower shell (2) through the support rod (15), and the setting direction of the resistance rod (13) is the same as the movement direction of an output shaft of the air cylinder (14); the conductive block (16) is of an annular structure and is sleeved on the outer side of the resistance rod (13) in a matching mode, the conductive block (16) is fixedly connected with an output shaft of the air cylinder (14), and the air cylinder (14) is controlled to work by the controller (11).

3. An AFCI intelligent arc protection detection device for distributed photovoltaic inverters according to claim 2, wherein: the resistance rod (13) is electrically connected with a wire board (12) integrated with the wiring terminal (4); the size of the support rod (15) is smaller than that of the resistance rod (13), and the support rod (15) is made of an insulating material.

4. An AFCI intelligent arc protection detection device for a distributed photovoltaic inverter according to claim 1, wherein: a winding wheel (17) is arranged in the lower shell (2), and the winding wheel (17) is connected with the lower shell (2) through a coil spring.

5. An AFCI intelligent arc protection detection device for a distributed photovoltaic inverter according to claim 1, wherein: radiating holes (9) are formed in the side surfaces of the upper shell (1) and the lower shell (2), and a protective sleeve (6) made of rubber materials is arranged on the outer side of the lead (5); a clamping hook is arranged on the connecting block (3), clamping grooves are correspondingly arranged on the upper shell (1) and the lower shell (2), and the clamping hook and the clamping grooves are mutually clamped.